net-im/qtox: skip network tests

This was already done in the -9999 ebuild, so just copying
the src_test() over in this version.

Closes: https://bugs.gentoo.org/827209
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

net-im/qtox/qtox-1.17.3.ebuild

@@ -80,3 +80,8 @@ src_configure() {
 
 	cmake_src_configure
 }
+
+src_test() {
+	# The excluded tests require network access.
+	cmake_src_test -E "test_(bsu|core)"
+}